| Acronym | Meaning |
| ASA | Alternancy Symmetry Adapted (method For Spin-independent Hamiltonians For Alternant Hydrocarbons) |
| MCNDO | Modified Complete Neglect Of Differential Overlap |
| AIUPS | Angle-integrated Ultraviolet Photoelectron Spectroscopy |
| HDPEX | Cross-linked |
| FPC | Fractional Parentage Coeff. (in Group-theor. Calcns.) |
| LOMU | Mantle Component With Low Pb-206/Pb-204 |
| EFTA | European Free Trade Association |
| PNC | Parity Nonconservation |
| SUP-CI | Superdirect CI |
| ODPAS | Optically Detected Photoacoustic Spectroscopy |